EUVD-2026-56301
GHSA-j5xq-mhhm-fmpp
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Local file-open trigger (AV:L), no prior privilege required (PR:N), user must open crafted image (UI:R), full impact on user context with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code locally.
AnalysisAI
Heap-based buffer overflow in Windows Imaging Component (WIC), Microsoft's built-in image processing framework, enables local code execution across virtually every supported Windows client and server release from Windows 10 1607 through Windows 11 25H2 and Windows Server 2012 through 2025. The flaw is triggered when a user opens or previews a specially crafted image file, requiring no prior authentication or elevated privileges, and yields full confidentiality, integrity, and availability impact on the compromised system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that a local user on the target system open, preview, or otherwise cause Windows Imaging Component to parse a specially crafted image file, as confirmed by the UI:R CVSS metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects a high-severity local code execution flaw with no privilege prerequisite but mandatory user interaction, consistent with a file-lure delivery mechanism. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary remediation is to apply the vendor-released patches distributed through Windows Update, WSUS, or Microsoft Update Catalog for each affected build, targeting the fixed versions confirmed by EUVD-2026-56301 - for example, Windows Server 2025 to build 10.0.26100.33296, Windows Server 2019 to 10.0.17763.9115, Windows 11 23H2 to 10.0.22631.7517, and Windows 10 22H2 to 10.0.19045.7663. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Begin immediate response within 24 hours by inventorying all Windows systems to identify critical business-impacting assets (domain controllers, file servers, systems handling sensitive data, executive workstations). …
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External POC / Exploit Code
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